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884 Priamus (A917 SU)
Classification: Jupiter Trojan          SPK-ID: 2000884
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1232715110210285 4.3769e-08  
a 5.183376403388697 6.1973e-08 au
q 4.544413761952228 2.6019e-07 au
i 8.915353876240186 4.2407e-06 deg
node 301.5611330897761 2.7976e-05 deg
peri 335.5280377934697 3.3916e-05 deg
M 324.7322888631784 2.0231e-05 deg
tp 2459422.772035886796
(2021-Jul-27.27203589)
0.0002431 TDB
period 4310.39974013314
11.80
7.7303e-05
2.116e-07
d
yr
n .08351893599290174 1.4978e-09 deg/d
Q 5.822339044825165 6.9612e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2780  
   data-arc span      37580 days (102.89 yr)  
   first obs. used      1917-11-08  
   last obs. used      2020-09-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42041  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:24:44  

Additional Information
 Earth MOID = 3.53053 au 
 Jupiter MOID = .416818 au 
 T_jup = 2.961 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456629.5 (2013-Dec-03.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1220432353047059 4.3918e-08  
q 4.549054210155802 2.6151e-07 au
tp 2455126.471299812142
(2009-Oct-21.97129981)
0.00024655 TDB
node 301.5616677271815 2.799e-05 deg
peri 336.1708474819955 3.3995e-05 deg
i 8.913180288432091 4.2396e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2780  
   data-arc span      37580 days (102.89 yr)  
   first obs. used      1917-11-08  
   last obs. used      2020-09-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42041  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:24:44  

Additional Information
 Jupiter MOID = .416818 au 
 T_jup = 2.961 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.928788366063982E-15 -1.12934864371058E-14 3.990678442900479E-13 -4.153896128703969E-15 3.850205285703752E-14 6.205316108201386E-17
q -1.12934864371058E-14 6.838551518742238E-14 -4.657779730179945E-12 4.088715296281017E-14 -3.235542191518077E-13 -2.163340783461797E-15
tp 3.990678442900479E-13 -4.657779730179945E-12 6.078608005689688E-8 -2.290737724793592E-11 4.79799013465535E-9 5.581406115831631E-12
node -4.153896128703969E-15 4.088715296281017E-14 -2.290737724793592E-11 7.834499574287107E-10 -7.746775788132404E-10 1.773153917479537E-11
peri 3.850205285703752E-14 -3.235542191518077E-13 4.79799013465535E-9 -7.746775788132404E-10 1.155685445055971E-9 -1.722948943221371E-11
i 6.205316108201386E-17 -2.163340783461797E-15 5.581406115831631E-12 1.773153917479537E-11 -1.722948943221371E-11 1.797445143357662E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.7   n/a MPO473774  
diameter diameter 101.093 km 0.539 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 6.8605 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[French, L.M.; Stephens, R.D.; Lederer, S.M. (2011) Minor Planet Bull. 38, 2-3.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Shevchenko, V.G.; Belskya, I.N.; Slyusarev, L.G.; Krugly, Yu.N.; et al. (2012) Icarus 217, 202-208.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2015) Minor Planet Bull. 42, 216-224.]
[Stephens, R.D.; Coley, D.R.; Warner, B.D.; French, L.M. (2016) Minor Planet Bull. 43, 323-331.]
[Stephens, R.D. (2017) Minor Planet Bull. 44, 123-125.]
geometric albedo albedo 0.044   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
B-V BV 0.718   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=.98, mean=2.85, max.=6.08) deg.
U-B UB 0.229   0.051 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=.98, mean=2.96, max.=6.08) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

884 Priamus (A917 SU)          Discovered 1917-Sep-22 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A917 SU = 1929 XX = 1938 KE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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